Wesley and a friend in the Denubian Alps
The Denubian Alps was a mountain range. The mountains were covered by a deep powder of snow which was ideal for skiing.
In 2364, Wesley Crusher and eleven other students were given skiing lessons by a ski instructor in a holodeck simulation of this location. (TNG: "Angel One")
In the script for "Angel One", the ski instructor had scheduled skiing lessons at the Swiss Alps.